Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The non-aqueous electrolyte contains a lithium salt and a carboxylic acid, and the lithium salt includes lithium difluorophosphate. The content of the carboxylic acid in the non-aqueous electrolyte is 5 ppm or more and 900 ppm or less with respect to the mass of the non-aqueous electrolyte.

Abstract: A non-aqueous liquid electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, in which the positive electrode includes a positive electrode active material, and a carbon nanotube, the positive electrode active material includes a lithium-transition metal composite oxide containing Ni, a proportion of Ni in metal elements other than Li in the lithium-transition metal composite oxide is 80 atm % or more, and the non-aqueous electrolyte includes a fluorosulfonic acid salt.

Abstract: The non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte. The electrolyte includes an organic sulfuric acid salt represented by a formula (1): (R—O—SO3)nX1, where R is an organic group with 1 or more carbon atoms, X1 is a cation, and n is an integer of 1 to 3. The electrolyte further includes ethylene carbonate and fluoroethylene carbonate. The ethylene carbonate volume Vec and the fluoroethylene carbonate volume Vfec satisfy 0.1?Vec/Vfec?15.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolyte; the electrolyte includes an acid anhydride; the negative electrode includes a negative electrode mixture including a negative electrode active material and a carbon nanotube; and the negative electrode active material includes a silicon-containing material and a carbon material.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode material mixture containing a negative electrode active material capable of electrochemically absorbing and releasing lithium ions, and carbon nanotubes. The negative electrode active material includes a silicon-containing material and a carbonaceous material. The non-aqueous electrolyte includes at least one cyclic ester selected from the group consisting of a cyclic sulfate ester, a cyclic sulfite ester, and a sultone. A content of the carbon nanotubes in the negative electrode material mixture is 0.005 mass% or more and 0.05 mass% or less.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein the negative electrode includes a negative electrode current collector, and a negative electrode active material layer supported by the negative electrode current collector and containing a silicon material as a negative electrode active material; when dividing the negative electrode active material layer into two layers of a first region and a second region having the same thickness, the second region is closer to the negative electrode current collector than the first region; the silicon material is contained in the first region more than the second region; and the nonaqueous electrolyte includes at least one additive selected from the group consisting of a sulfite compound and a sulfate compound.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein the negative electrode includes a negative electrode current collector and a negative electrode active material layer supported by the negative electrode current collector, when dividing the negative electrode active material layer into two layers of a first region and a second region having the same thickness, the second region is closer to the negative electrode current collector than the first region, the first region and the second region each contains graphite particles, a ratio P1/P2 of interparticle porosity P1 of the first region to interparticle porosity P2 of the second region is greater than 1, and the nonaqueous electrolyte includes at least one additive selected from the group consisting of a sulfite compound and a sulfate compound.

Abstract: A nonaqueous electrolyte secondary battery includes a negative electrode plate, a negative electrode current collector lead joined to the inner peripheral end of the negative electrode plate, and a negative electrode current collector-exposed part where a negative electrode active material layer is not formed at the outer peripheral-side end. The negative electrode current collector-exposed part at the outer peripheral end comes in contact with a battery case, and in a plane vertical to the axis of an electrode body, a line connecting the axis and the center of a positive electrode current collector lead does not coincide with a line connecting the axis and the center between the coating end of the outer peripheral-side negative electrode active material layer of the negative electrode plate and the terminal part of the outer peripheral-side positive electrode plate.

Abstract: A non-aqueous electrolyte secondary battery having a positive electrode, a separator, a negative electrode opposed to the positive electrode via the separator, and a liquid electrolyte wherein the liquid electrolyte includes a lithium salt, methyl acetate, and dimethyl sulfone. The content ratio of methyl acetate in the liquid electrolyte is 10% by mass to 40% by mass, and the content ratio of dimethyl sulfone in the liquid electrolyte is 0.1% by mass to 5% by mass.

Abstract: A negative electrode material mixture with a negative electrode active material including a Si-containing material and a carbon material; and a carbon nanotube. The Si-containing material includes, a first composite material in which Si particles are dispersed in a lithium silicate phase and/or a carbon phase, and a second composite material in which Si particles are dispersed in a SiO2 phase, at least the first composite material. A mass ratio X of the first composite material to a total of the first and second composite materials, and a mass ratio Y of the total of the first second composite materials to a total of the first composite material, the second composite material, and the carbon material satisfy a relational expression (1): 100Y?32.2X5+65.479X4?55.832X3+18.116X2?6.9275X?3.5356<0, X?1, and 0.06?Y. The non-aqueous electrolyte includes LiPF6 and LiN(SO2F)2.

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode and a liquid electrolyte, wherein the liquid electrolyte contains lithium bis(fluorosulfonyl)imide and dimethyl sulfate.

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode and a liquid electrolyte, wherein the liquid electrolyte contains a lithium salt and isopropyl acetate, and the lithium salt includes lithium bis(fluorosulfonyl)imide, and a content of isopropyl acetate in the liquid electrolyte is 1000 ppm or less with respect to a mass of the liquid electrolyte.

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode and a liquid electrolyte, wherein the liquid electrolyte contains lithium bis(fluorosulfonyl)imide and 1,4-dioxane.

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The non-aqueous electrolyte contains a lithium salt and a carboxylic acid, and the lithium salt includes lithium difluorophosphate. The content of the carboxylic acid in the non-aqueous electrolyte is 5 ppm or more and 900 ppm or less with respect to the mass of the non-aqueous electrolyte.

Abstract: A solar cell module includes solar cells having main surfaces to which inter-cell wiring members are connected, and an insulating member disposed on the main surfaces and the wiring members, and a first lead-out wire provided to the insulating member. The insulating member includes a first insulating layer formed of polyester resin, a second insulating layer formed of polyolefin or EVA and provided between the first insulating layer and the lead-out wires, and a third insulating layer formed of polyolefin or EVA and provided between the first insulating layer and the main surfaces. The third insulating layer has a thickness in a direction perpendicular to the main surfaces larger than a thickness of the second insulating layer.

Abstract: A solar cell module having: a plurality of solar cells; a first protective member provided on the light-receiving surface side of the solar cells; a second protective member provided on the reverse surface side of the solar cells; a sealing layer for sealing the solar cells, the sealing layer being provided between the protective members; and a wavelength conversion substance for absorbing light of a specific wavelength and converting the light into light of a longer wavelength. The wavelength conversion substance is contained in at least a gap region, corresponding to the gap between the solar cells, of a reverse-surface-side region located on the side of the sealing layer nearer to the second protective member than the solar cells. The concentration of the wavelength conversion substance is higher in the gap region than in the region sandwiched by the reverse surface of the solar cells and the second protective member.

Abstract: A solar cell module includes: a solar cell; a conductive light-reflective film disposed on a back surface side of the solar cell, the conductive light-reflective film extending from an edge portion of the solar cell; an insulating member disposed between a back surface of the solar cell and the conductive light-reflective film; and a back-surface side encapsulant covering the solar cell and the conductive light-reflective film from the back surface side of the solar cell, wherein the insulating member is made of a material harder than a material of the back-surface side encapsulant.

Abstract: A nonaqueous electrolyte secondary battery includes a negative electrode plate, a negative electrode current collector lead joined to the inner peripheral end of the negative electrode plate, and a negative electrode current collector-exposed part where a negative electrode active material layer is not formed at the outer peripheral-side end. The negative electrode current collector-exposed part at the outer peripheral end comes in contact with a battery case, and in a plane vertical to the axis of an electrode body, a line connecting the axis and the center of a positive electrode current collector lead does not coincide with a line connecting the axis and the center between the coating end of the outer peripheral-side negative electrode active material layer of the negative electrode plate and the terminal part of the outer peripheral-side positive electrode plate.

Abstract: A solar cell module includes: two solar cells adjacent one another across a space; an elongated light reflector extending over the two solar cells; and a front protector covering front surfaces of the two solar cells and the light reflector. In a plan view of the two solar cells, each of the two solar cells has chamfered corners and a substantially octagonal shape with linear long sides and linear or non-linear short sides, connected alternately. The light reflector, in the plan view, protrudes in the longitudinal direction from an intersection between a first long side facing another long side across the space, among the long sides, and a first short side one end of which is connected to the first long side, among the short sides, to cause light reflected by the uneven structure of the light-reflective film to reach at least one of the two solar cells.

Abstract: A solar cell module includes a first solar cell, a second solar cell disposed with a gap from the first solar cell, and a light reflection sheet bridging between the first solar cell and the second solar cell across the gap. The light reflection sheet is at least partially bent between the first and second solar cells.